The bottle system is what it is. I think the door at the bottom is not the best decision - practically everytime I would squonk the bottle, the bottom tabwould pop off. Either get stronger magnets for the bottom tab or come up with a different one altogether. The rda that came with the mod was a P.O.S. The positive pin block was loose no matter how tightly I screwed it in. So that goes in trash. The pico squeeze is way better imo... This Luxotic only "looks" nicer.